How can I put them all into one portfolio and just keep adding to them as we obtain more? 

What if I am sending the voicemail/text blast to a list generated from ads for real estate for rent?

You can also do a Google search to get a ton of resources.

Lots of reviews...I think over 1000 on google.

In my market the valuation with f/f non commercial financing is typically lower than the hands off cost of adding the ADU.  

Check Reviews & Testimonials – Look for reviews on BiggerPockets, Google, BBB, and Trustpilot to see real investor experiences. 2.

We've added central air and ductwork when we were also doing other remodleing that already required wall demo or wall replacement/moving. 

In a way, I think the BRRRR process is really the process of "adding value" to a property and then pulling out that forced equity as much as you can.

You can also search Google and read reviews.

However, if you're okay with some cash flow but AMAZING appreciation potential and the best macroeconomics, I would look into the Columbus Ohio market as this is where all of the population growth, job growth, and companies moving/developing here (for example Intel, Google, Amazon, FB, LG, Honda, Nationwide, Anduril, etc).